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Finding the Fourth Proportional to 18,693.76, 28,000.44 and 8,818.24

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Solution

The fourth proportional to 18,693.76, 28,000.44 and 8,818.24 is: 13,208.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693.76 : 28,000.44 = 8,818.24 : x
  2. Step 2: Convert to fraction form
    18,693.76/28,000.44 = 8,818.24/x
  3. Step 3: Cross multiply
    18,693.76x = 28,000.44 × 8,818.24
  4. Step 4: Simplify right side
    18,693.76x = 246,914,600.03
  5. Step 5: Solve for x
    x = 246,914,600.03/18,693.76
  6. Step 6: Final answer
    x = 13,208.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.